Add 21/30 and 9/63
21/30 + 9/63 is 59/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 63 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 30 × 21 = 630,
21/30 = 21 × 21/30 × 21 = 441/630 - Likewise, for the 2nd fraction, since 63 × 10 = 630,
9/63 = 9 × 10/63 × 10 = 90/630 - Add the two like fractions:
441/630 + 90/630 = 441 + 90/630 = 531/630 - 531/630 simplified gives 59/70
- So, 21/30 + 9/63 = 59/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/30+9/63 21/30+18/63 21/60+9/63 63/30+9/63 21/30+27/63 21/90+9/63 21/30+45/63